Friction draft-rigging.



CfJ. NASH.

FRICTION DRAFT RIGGING. AryLloATxoN FILED APR. ze, woef Patented Nov. 18, 1913.

2 SHEETS-SHEET l.

G. J. NASH.

FRICTION DRAFT RIGGING. APPLICATION FILED APR.26,1909.

1,078,946. Patented,Nov.18,1913

2 SHEETS-SHEET 2.

f 1 HZ l r1 Mg ("\Q f7 i UNITED sTATEs PATENT orrIoE.

CHARLES J. NiisH, or CHICAGO, ILLINOIS, AssrGNoa, BY MESNE ASSIGNMENTS, To

WILLIAM H. MINER, or CHICAGO, ILLINOIS,

FRICTION DRAFT-RIGdING.

Application led April 26,. 1909.

To all whom t may concern.'

Be it known that I, CHARLES J. NASH, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Friction Draft-Rigging, of which the following is a specification.

My invention relates to improvements in friction draft rigging.

The object of my invention is to provide a friction draft rigging of a strong, simple', eilicient and durablel construction, which will be short and compact in form and occupy small space, which may be manufactured at small cost, and which at the' same time will be readily accessible and capable of being easily and conveniently put in place and removed.

My invention consists in the means I employ to practically accomplish this object or result, as herein shown and described, and more. particularly specied in the claims; th same'v comprising in connection with a draw-bar, draft yoke and draft members secured to the draft sills or frame members of the car, of ai pair of followers extending through the draft yoke, one abutting directly against the draw-bar and the other against the rear end of the draft yoke, a pair of opposing friction wedges abutting. one directly against the front foilower and the other directly against the rear follower', and having inclined friction faces, upper and lower friction blocks having incl-ined friction faces engaging the friction faces of the wedges, removable gui-de ba'rs` or' plates secured to the' draft members and support-v ing the draft rigging, the lower friction block Ahaving on its under face depending ribs fitting astride the lower member o-f the' draft yoke and between the guide' bars or plates which support the draft rigging., and the upper friction block having upwardly projecting ribs fitting astri-'del the' upper member of the draft yoke, a vertically arranged spring. bearing at one end against one of thfe friction'blfocks, and a connecting rod for the spring having a spring seat or Specicaton of Letters Patent.

Serial No. 492,184.

der the tension of the spring, and the fric tion blocks and spring also moving longitudinally. 'Ihe holes or openings in the draft yoke through which the connecting rod eX- tends arev longitudinal slots, as the spring, upper and lower friction blocks and connecting rod while moving longitudinally have a less amount of longitudinal move` ment than the draw-bar and yoke', the same being approximately one half. The con-- necting rod, in connection with the upper and lower friction blocks, having round holes through which the' connecting rod cird tends,y serves also as a pivot upon which -the draw-bar may swing laterally from side to side, when the train isrounding curves. The upwardly and down- Wardly projecting guide ribs on the upper and lower friction blocks are preferably lfurnished vrith slightly curved faces for clearing the draft yoke to enable the drawbar and draft yoke to swing laterally without binding.

The upright spring, which iolds the upper a-n-d lower friction blocks under tension is preferably, as illustrated ini the drawing, arranged below the' lower friction block, as ordinarily thisconstruction` is more convenient than the' reverse one Where the spring is above the upper friction block.

My invention also consists in the novel construction of parts and devices and in the novel combinations of parts and devicesherein shown and described, and more par'- ticularly specified in' thc claims.

In the accompanying drawing forming a part of this specification, Figure l is a side elevation partly in longitudinal section 0f a friction draft rigging embodying my invention. Fig. Q is a plan View, partly in lrorizontal section. Fig. 3 is a vertical cross sectionon linc'?) of Fig. l. Fig. 4 is a detail perspective View of one' of the friction blocks, the friction blocks being preferably duplicates of each other and Fig; 5 is a face View offone of the friction wedges.

. In the drawing, A represents the center or draft sills of acar' to which they draft rigging is applied, A1 the front sill and A2 the carry-iron.

B is the coup-ler draw-bar, B1 the draftyoke secured tothe draw-bar in any suitable manner, as by rivets b and interengaging lugs or shoulders bl b2.

C CI are front and rear followers and D the draft members secured to the draft sills wedging faces A and against which the followers abut. The front follower contacts directly with the rear end of the draw-bar and the rear follower contacts directly against the rear end Y of the draft yoke B1 or the filler block B2 therein if one is employed.

. F F are oppositely facing friction wedges, the front one in directcontact with the front follower C and the rear one in direct contact with the rear follower, the same extendiyng transversely through the yoke.

Gand Gl are upper and lower friction blocks extending through the draft yoke B1, and each havnig inclines or wedgingfaces g g engaging the corresponding inclines or f f of the friction wedges F F. The friction wedges F F are preferably duplicates of each other, and the friction blocks G G1 are also preferably duplicates of eachother. Each of the friction blocks G'lias on its outer face a pair of parallel guide ribs g1 g1, those on the lower friction block Gl fitting astride the lower member of the draft yoke B1 and between the removable guide bars or plates E E which support the draft rigging, and which are removably secured to the draft members D by short bolts d1 extending through the lower flanges d2 of the draft members D and upon which guide bars or plates the followers directly rest.

The parallel guide ribs g1 on the upper facev of the upper friction block G lit astride the upper member of the draft yoke B1.

H, l1, are upright springs, preferably arranged below and acting at their upperends against the lower friction block Gl and bearing at their lower ends against the spring seat or bearing plate H at the lower end of the connecting rod H2 which extends up centrally through the` springs through longitudinal slots b3 in the upper and lower members of the draft yoke, through holes g2 in the upper and lower friction blocks G G1 and between the friction wedges F F, and also through a cap or top plate H3 which rests` upon and bears against the upper friction block G. ,The cap H3 is preferably furnished with'depending fianges h1 embracing the parallel ribs'g1 on the upper face of the upper friction block G". The central connecting bolt H2 is furnished with a head k2 at one end, preferably its lower end, and with a threaded nut h3 at its upper end and a key It* for locking the nut from turning. A spring seat or bearing'plate H4 is interposed between t-he upper end of the springs H, l1., and the lower friction block G1. The friction wedges F are each furnished at their meeting ends or edges with a recess or slot f1 to accommodate or clear the central' connecting bolt H2, which has only about half the longitudinal movement of the wedges F F.

The upright inner faces of the guide ribs g1 on the friction blocks G Grl which span i the upper and lower limbs of the draft yoke are preferably sli htly rounded or curved to enable the dra yoke to properly clear these guide ribs when the draw-bar swings laterally from side to side about the connecting rod H2 as a pivot.

'lhe followers are preferably made of wrought iron, and the friction blocks of hard, white cast iron and the friction wedges, in order to produce an efficient frictional action with the friction blocks, are preferably made of soft, malleable iron, this construction producing a large amount of frictional resistance. A material advantage is thus secured in making the friction wedges in separate pieces from the followers against which they abut.

The outer faces of the guide ribs g1 on the upper and lower friction blocks are Hush with thev outer faces of the draft yoke when the draft riggin releases and the spring eX- pands to norma or uncompressed position, and the. up er and lower members of the draft yoke by t eir cooperating action with the guide ribs g1 and the inner spring seat H1 and cap H3 thus cause the loose friction wedges F F to be restored to central and proper position between the u bers of the draft yoke. The draft yoke, and plates H1 H3 adjacent to the draft yoke, the

"spring and friction blocks G G1 and the guide ribs g1 thereon thus coperate in releasing to maintain the friction wedges F F always in central position.

I claim 1. In a friction draft rigging, the combination wit-h a draw-bar, draft yoke, draft members and front and rear followers contact-ing with the draw-bar and draft yoke, a pair of longitudinally movable oppositely faced friction wedges contacting with the followers and extending transversely through the draft yoke, upper and lower friction blocks extending transversely through the draft yoke and having inclined friction faces in frictional engagement wlth the inclined friction faces of said wedges,

.an upright spring acting at its inner end against one of said friction blocks, and a central connecting rod having a spring seat at one end and extending through the friction blocks and the draft yoke, and a cap plate interposed between the other end of said connecting. rod and one of the friction blocks, substantially as specified.

2. In a friction draft rigging, the combination with a draw-bar, draft yoke, draft members and front and rear followers, contacting with the draw-bar and draft yoke, a pair of longitudinally movable oppositely faced friction wedges contacting with the followers and extending transversely through the draft yoke, upper and lower friction blocks extending transversely through the draft yoke and having inclined per and lower mem- 3. In a friction draft rigging, the combination with a draw-bar, draft yoke, draft members and front and rear followers contacting with the draw-bar and draft yoke, a air of longitudinally movable oppositely aced friction wedges contacting with the followers and extending transversely through the draft yoke, upper and lower friction blocks extending transversely through the draft yoke and having inclined friction faces in frictional engagement with the inclined friction faces of said wedges, an upright spring acting at its inner end against one of the friction blocks, and a central connecting rod having a spring seat at its outer end and extending through the friction blocks and the draft yoke and separately formed from the said blocks, said upper and lower friction blocks having on their outer faces parallel ribs fitting astride the upper and lower members of the draft yoke, each of said upper and lower friction blocks being removable from the yoke without disconnecting the yoke and draw-bar, and a cap plate interposed between the upper end of said connecting rod and the ifipper friction block, substantially as speci- 4. In a friction draft rigging, the combination with a draw-bar, draft yoke and followers, of oppositely facing friction wedges extending through the draft yoke, andl upper and lower friction blocks frictionally engaging said wedges, and an upright spring acting against one of the friction blocks and a connecting rod for the spring extending through the yoke, and a cap plate interposed between the upper end of said con necting rod andthe upper friction block, substantially as specified.

5. In a friction draft rigging, the combination with a draw-bar, draft yoke and followers, of oppositely facing fr1ction wedges extending through the draft yoke, and upper and lower friction blocks frictionally engaging said wedges, and an upright spring acting against one of the friction blocks and a connecting rod for the spring extending through the yoke and the friction blocks, and a spring seat plate at the outer end of said connecting rod, said yoke having longitudinal slots to receive said rod, and a cap plate interposed between the upper end of said connecting rod and the upper friction block, substantially as speci fied.

6. In a friction draft rigging, the combination with a draw-bar, draft yoke and followers, of oppositely facing friction wedges extending through the draft yoke, and upper and lower friction blocks frictionally engaging said wedges, and an upright spring acting against one of the friction blocks and a connecting rod for the spring extending through the yoke, a bearing plate outside. the yoke and interposed bet-Ween the upper end of said connecting rod and said upper friction block, said connecting rod serving as a pivot for the draw-bar and draft yoke to swing laterally upon in rounding curves, substantially as specified.

7. In a friction draft rigging, the combination with a draw-bar, draft yoke and followers, of oppositel)7 facing friction wedges extending through the draft yoke, and upper and lower friction blocks frictionally engaging said wedges, and an upright spring acting against one of the friction blocks and a connecting rod Afor the spring extending through the yoke, said connecting rod servin as a pivot for the draw-bar and draft yo e to swing laterally upon in rounding curves, said upper and lower friction blocks having guide ribs fitting astride the upper and lower members of the draft yoke and provided with curved inner edges to permit the draw bar and draft yoke to swing laterally without binding, substantially as specified.

CHARLES J NASH. Witnesses:

EDMUND ADcooK, WILLIAM A. GEIGER.

Ueptel at tbl! patent may be obtained for tlve cents each, by addressing the Commissioner of Patenti,

Washington, D. G. 

